Jamtlandic or Jamtish (jamska, formally a definite form, in Jamtlandic)'s a well-defined group of dialects of Scandinavian. It's spoken in the Swedish province Jämtland. It's commonly used in the region between the modern Swedish-Norwegian border in the west and the pre-1645 Swedish-Norwegian border in the east, though Trøndersk's spoken in Frostviken in the northernmost part of Jämtland colonized in the 18th century by Norwegians, and Norrlandic's spoken in Ragunda in the easter… (More on Jamtlandic)